Reducing Tee Pipe Fitting Material Malleable Iron Fitting Schedule/Class Class 150 Pipe Size - Pipe Fitting 4 in x 3 in x 4 In. Fitting Connection Type FNPT Standards UL FM Approved ASME B16.3 Max Pressure 300 psi@150 Degrees F Saturated Steam Pressure 150 psi @ 350 Degrees F Temp Range -20 Degrees to 350 Degrees F